* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: #000;
  color: #fff;
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  overflow-x: hidden;
}

nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 40px;
  position: sticky; top: 0; z-index: 100;
  background: rgba(0,0,0,0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-brand { font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.nav-sign-in {
  padding: 10px 24px; border-radius: 12px; border: 1.5px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06); color: #fff; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
}
.nav-sign-in:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.3); }

.hero {
  text-align: center;
  padding: 120px 40px 100px;
  max-width: 700px; margin: 0 auto;
}
.hero h1 {
  font-size: 56px; font-weight: 800; line-height: 1.1; letter-spacing: -1.5px;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 19px; line-height: 1.6; color: #888;
  margin-bottom: 40px; max-width: 520px; margin-left: auto; margin-right: auto;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  padding: 14px 36px; border-radius: 14px; border: none;
  background: #fff; color: #000; font-size: 16px; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
}
.btn-primary:hover { background: #e0e0e0; transform: translateY(-1px); }
.btn-secondary {
  padding: 14px 36px; border-radius: 14px;
  border: 1.5px solid rgba(255,255,255,0.2); background: transparent;
  color: #fff; font-size: 16px; font-weight: 600;
  cursor: pointer; transition: all 0.2s; text-decoration: none;
  display: inline-flex; align-items: center;
}
.btn-secondary:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.3); }
.btn-soon { opacity: 0.4; cursor: default; }
.btn-soon:hover { background: transparent; border-color: rgba(255,255,255,0.2); }

.features { padding: 80px 40px; max-width: 1000px; margin: 0 auto; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px; padding: 32px 24px;
  transition: all 0.2s;
}
.feature-card:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.15); }
.feature-icon {
  width: 48px; height: 48px; border-radius: 14px;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; fill: #fff; }
.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.6; color: #777; }

.cta {
  text-align: center; padding: 100px 40px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.cta h2 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.cta p { color: #666; font-size: 16px; margin-bottom: 32px; }

.downloads {
  padding: 80px 40px; max-width: 800px; margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.downloads h2 { text-align: center; font-size: 32px; font-weight: 800; margin-bottom: 40px; }
.download-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.download-card {
  background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px; padding: 32px 24px; text-align: center;
}
.download-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.download-card p { color: #666; font-size: 13px; margin-bottom: 20px; line-height: 1.5; }
.download-card .btn-primary,
.download-card .btn-secondary { width: 100%; padding: 12px; font-size: 14px; }

footer {
  text-align: center; padding: 40px; color: #333; font-size: 13px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

@media (max-width: 768px) {
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .download-grid { grid-template-columns: 1fr; }
  nav { padding: 16px 20px; }
  .hero { padding: 80px 20px 60px; }
}